Cloth-tightener for middlings-purifiers



(N0 Model.)

. I.. DICK. 010th Tightener for Middlin gs Purifier Patented June14,1881.

Sums V v 5 \\\\\\7 \\\\\7 \\\\\\\y $1 m m \g/ \\\\\\\W M w N AH UNITEDSTATES PATENT OFFICE.

IRA DICK, OF MUNGIE, INDIANA.

CLOTH-TIGHTENER FOR MlDDLlNGS-PURIFIERS.

SPECIFICATION forming part of Letters Patent No. 242,818, dated June 14,1881.

Application filed March 4, 1880. (No model.)

To all whom it may concern:

Be it known that I, IRA DICK, a citizen of the United States, residingat Muncie, in the county of Delaware and State of Indiana,have inventeda new and useful Oloth-Tightener for Middlings-Purifiers, of which thefollowing is a specification. 1

My invention relates to improvements in cloth-tighteners as applied tomiddlings-purifiers in which a shaker-frame is used, and on the underside of which is attached the cloth 5 and the objects of my improvementsare, first, to provide a simple device for stretching the cloth inmiddlings-purifiers lengthwise and crosswise; secondly, to provide atightening device which will hold the cloth'bars (or frame) up to theshaker-frame, and forholding up the center of the cloth. I attain theseobjects by the mechanism illustrated in the accompanying drawings,in-which- Figure l is a perspective View of the shakerframe. Fig. 2 is alongitudinal section of the shaker-frame. Fig. 3 is a plane view of onecorner of the shaker-frame.

Similar letters refer to similar parts thron ghout the several views.

a is the shaker-frame; c, the cloth-bar; 0, end cloth-bar; D, thehangers; G, the setscrews; F, the adjusting-bolts, B, the cloth, and I Iare the rods. The shaker-frame a consists of two side bars, two centralor intermediate bars, and three (more or less) crossbars, as showninFig. l. The hangers D are L-formed and fastened on both sides and ateach end of the shaker-frame. The adj ustin gbolt F passes through thelower part of the hangers and through the center of the cloth bar a, towhich the cloth is secured. The setscrew G passes up through the underside of the hangers D, as shown at Fig. 3. The said screw is for thepurpose of pressing the clothbar 0 up tight against the lower edge ofthe side bar, a, to prevent the middlin gs from working out betweenthem. To tighten or loosen the cloth it is only necessary to loosen theset-screws G, turn the thumb-nuts (which are on the outer ends of thebolts F) as desired, then retighten the set-screws G, and the work iscomplete.

The rods 1 I are held up at each end of the frame by two iron hangers orplates, as shown in Figs. 1 and 2. One end of each rod is provided withthreaded taps for stretching the rods up until they come up against thecloth and central rails of the shaker-frame, as shown in Fig. 2. Bytightening the rods it prevents the cloth from swaying when the weightof the middlings is upon it, and neither do the rods prevent thetightening of the cloth in any way.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is-

In a middlings-purifier, the combination, with a shakerframe constructedwith intermediate bars, of rods arranged beneath the cloth for retainingthe cloth in position, said rods being suitably supported beneath andlengthwise of said bars, and adapted to be secured in place or removedat will, substantially as set forth.

2. In a middlings-purifier, a shalrer-frame having rods arranged beneaththe cloth of said shaker adapted to support the cloth or permit itsadjustment, application, or removal, as shown and described.

3. The combination, with the shaker-frame ing-cloth connected to saidshaker-frame by devices for stretching the cloth, and the rods I,supported beneath the cloth longitudinally IRA. DICK.

Witnesses:

" J osEPH W. EDMoNDs, J OHN F. SANDERS.

c, provided with intermediate bars, of the bolt-

